Inventor
KAWASUMI MASANORI
JP56 patents
⚠️ This page may combine multiple inventors who share the name “KAWASUMI MASANORI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
39 patentsUS7480476B2Jan 20, 2009
Developer container, developer supplying device, and image forming apparatus
RICOH KK115 citations99
US7321744B2Jan 22, 2008
Developer container, developer supplying device, and image forming apparatus
RICOH KK111 citations99
US7697870B2Apr 13, 2010
Developer container, developer supplying device, and image forming apparatus
RICOH KK54 citations98
US7519317B2Apr 14, 2009
Developer container, developer supplying device, and image forming apparatus
RICOH KK72 citations98
US7076192B2Jul 11, 2006
Powder conveying device and image forming apparatus using the same
RICOH KK55 citations96
US7398038B2Jul 8, 2008
Image forming apparatus using a toner container and a process cartridge
RICOH KK47 citations93
US7266324B2Sep 4, 2007
Charging device, and process cartridge and image forming apparatus using the charging device
RICOH KK18 citations93
US7212767B2May 1, 2007
Image forming apparatus and process cartridge removably mounted thereto
RICOH KK27 citations93
US7139504B2Nov 21, 2006
Charging device, and process cartridge and image forming apparatus using the charging device
RICOH KK24 citations93
US7050741B2May 23, 2006
Imaging apparatus, and toner and process cartridge used in the imaging apparatus
RICOH KK20 citations93
US6807390B2Oct 19, 2004
Image forming apparatus
RICOH KK37 citations93
US7672605B2Mar 2, 2010
Transfer device and image forming apparatus
RICOH KK22 citations92
US7630659B2Dec 8, 2009
Method and apparatus for image forming capable of effectively performing a charging process
RICOH KK23 citations92
US7373101B2May 13, 2008
Method and apparatus for image forming and effectively applying lubricant to an image bearing member
RICOH KK24 citations92
US7313347B2Dec 25, 2007
Cleaning device, process cartridge, image forming apparatus and toner
RICOH KK32 citations92
US7272354B2Sep 18, 2007
Cleaning unit and image forming apparatus having multiple cleaning blades
RICOH KK27 citations92
US7228099B2Jun 5, 2007
Cleaning device for cleaning a surface of an image support body
RICOH KK21 citations92
US7149465B2Dec 12, 2006
Cleaning unit, process cartridge, image forming apparatus, and toner
RICOH KK26 citations92
US7136610B2Nov 14, 2006
Image forming apparatus using installable process cartridge, method of positioning process cartridge, and process cartridge itself
RICOH KK38 citations92
US7110696B2Sep 19, 2006
Cleaning unit, process cartridge, and image forming apparatus
RICOH KK27 citations92
US7062194B2Jun 13, 2006
Charging device, and process cartridge and image forming apparatus including the charging device
RICOH KK31 citations92
US7024133B2Apr 4, 2006
Image forming apparatus using a user installable process cartridge, a method of arranging the process cartridge, and the process cartridge itself
RICOH KK50 citations92
US7826786B2Nov 2, 2010
Image forming apparatus, lubricant applying device, transfer device, process cartridge, and toner
RICOH KK17 citations84
US7672635B2Mar 2, 2010
Method and apparatus for image forming and effectively applying lubricant to an image bearing member
RICOH KK8 citations84
US7430377B2Sep 30, 2008
Image forming apparatus and process cartridge having a detachable unit body having a lubricant applying unit and image carrier mounted thereon
RICOH KK12 citations84
US7333744B2Feb 19, 2008
Image forming apparatus that charges a photosensitive member by superimposing an alternate current bias voltage on a direct current bias voltage as the charge bias voltage
RICOH KK11 citations84
US7295796B1Nov 13, 2007
Image forming apparatus having a temporary toner holding device and a toner collecting device
RICOH KK14 citations84
US7292816B2Nov 6, 2007
Method and apparatus for electrophotographic image forming capable of effectively removing residual toner, a cleaning mechanism used therein, a process cartridge including the cleaning mechanism used in the apparatus, and toner used in the apparatus
RICOH KK16 citations84
US7218877B2May 15, 2007
Charging device, and process cartridge and image forming apparatus including the charging device using the same
RICOH KK12 citations84
US7085528B2Aug 1, 2006
Cleaning unit, process cartridge, and image forming apparatus
RICOH KK12 citations84
US7493075B2Feb 17, 2009
Cleaning device, process cartridge and image forming apparatus
RICOH KK13 citations83
US7477862B2Jan 13, 2009
Charged device, cleaning device, process cartridge, toner, and image-forming device that uses these
RICOH KK13 citations83
US7003255B2Feb 21, 2006
Image forming apparatus and process cartridge
RICOH KK13 citations82
US7386257B2Jun 10, 2008
Imaging apparatus, and toner and process cartridge used in the imaging apparatus
RICOH KK7 citations74
US7130564B2Oct 31, 2006
Method and apparatus for image forming capable of removing residual toner without using a toner cleaning system, process cartridge for use in the apparatus and toner used for the image forming
RICOH KK8 citations74
US7065316B2Jun 20, 2006
Cleaning unit, process cartridge, image forming apparatus, and toner
RICOH KK10 citations74
US7680429B2Mar 16, 2010
Charging device including charging roller and cleaning roller
RICOH KK7 citations73
US7477856B2Jan 13, 2009
Method and apparatus for image forming capable of effectively preventing resonance of frequencies
RICOH KK6 citations63
US7400844B2Jul 15, 2008
Image forming apparatus and process cartridge with a cleaner for removing toner from an image bearing member
RICOH KK2 citations63
RICOH CO LTD
5 patentsUS8005406B2Aug 23, 2011
Developer container, developer supplying device, and image forming apparatus
RICOH CO LTD60 citations98
US7835673B2Nov 16, 2010
Developer container, developer supplying device, and image forming apparatus
RICOH CO LTD58 citations98
US7925188B2Apr 12, 2011
Development device, process cartridge, and image forming apparatus using the development device
RICOH CO LTD20 citations91
US8385793B2Feb 26, 2013
Image forming apparatus preventing gaps between a conveyor belt and transfer sheet
RICOH CO LTD8 citations84
US8000627B2Aug 16, 2011
Charging device, process cartridge, image forming apparatus, and toner
RICOH CO LTD10 citations84
TOSHIBA TEC KK
2 patentsUS6807395B2Oct 19, 2004
Computer assisted learning system, storage server used for computer assisted learning system and computer readable media recording program used in storage server
TOSHIBA TEC KK26 citations92
US7100158B2Aug 29, 2006
Program management apparatus, program management system, and program management method
TOSHIBA TEC KK19 citations79
HOSOKAWA HIROSHI
1 patentMIZUISHI HARUJI
1 patentTANAKA MASATO
1 patentSUZUKI HIROKATSU
1 patentShowing the top 50 of 56 patents by PatentIndex Score.